The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2017
Filed:
Oct. 14, 2013
Applicants:
Yingqiu Jiang, Sunnyvale, CA (US);
Aharon Hochbaum, Berkeley, CA (US);
Inventors:
Yingqiu Jiang, Sunnyvale, CA (US);
Aharon Hochbaum, Berkeley, CA (US);
Assignee:
OPTHENTIC CORP., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B42D 15/00 (2006.01); B42D 25/425 (2014.01); B42D 25/364 (2014.01); B42D 25/391 (2014.01);
U.S. Cl.
CPC ...
B42D 15/0093 (2013.01); B42D 25/364 (2014.10); B42D 25/391 (2014.10); B42D 25/425 (2014.10);
Abstract
The present invention relates generally to an optical security device and an optical security system in which hidden images that are invisible to the naked eye under unpolarized illumination, become visible under either linearly or circularly polarized illumination. Preferred fabrication methods of said optical security device are disclosed.